Laminated curb



Jan. 29, 1929. 1,700,565

W. ERNST ET AL LAMINATED CURB Filed Sept. 1927 WwEEs-z Elva??? Patented Jan. I 29, 1929.

UNITED STATES 1,700,565 PATENT OFFICE.

WALTER ERNST AND HOWARD F. MAOMILLIN, OF MOUNT GIIIZLEAIII, O HIO, ASSIGNORS T0 HYDRAULIC PRESS MANUFACTURING COMPANY, OF MOUNT GIL EAD, OHIO.

LAMINATED CURB.

Application filed September 6, 1927. Serial No. 217,694.

In extracting liquids from solids, it is necessary that a large area of the material be exposed when the solids are subjected to pressure in relation to the volume of material employed. Practical experiments have shown that little or no drainage can be obtained through the material itself, which seems to have a tendency to confine the liquid and keep it from draining even under enormous pressures. The first requisite therefore of a successful curb to be used in extracting liquids from solids is that it shall-be so designed that the area of material exposed to the pressure shall be as large as possible in relation to the volume of material employed.

It is also desirable that the drainage be arranged in such manner that the material cannot clog the openings through which the drainage takes place. In previous constructions, materials have been separated at right angles to the application of force, and the material has been wrapped in press cloth in order to keep it from clogging the drainage openings. Such constructions are cumbersome and uneconomical because they render continuous operation impossible and necessitate the use of press cloth, which is an important item in the running expense.

The object of the present invention is to provide a construction in which both of the necessary features for obtaining successful drainage shall be embodied in a simple construction.

In the drawings:

Figure 1 is a side elevation of a curb with part in vertical section.

Figure 2 is a perspective view of one-hall of one of the inner ring members divided on a vertical plane. v

Figure 3 is a similar view of one-half of an outer ringmember.

Figure 4 is a side elevation with parts in section showing the manner of assembling the elements of the curb.

Figure 5 is a top plan view of the construction shown in Figure 1.

Figure 6 is a bottom plan view of the same.

The curb as illustrated consists of an outer shell A and an inner shell B. It is to be understood, however, that the invention is not limited to two shells, as there may be employed any desired number of concentric shells.

These shells are shown as being cylindrical,

but this is not an essential feature of the inanother the space between two projecting ribs 2 will be dovetailed in form, as clearly shown in the drawings.

'lhese dovetailed grooves form seats in which are placed felt rings .3 which are preferably oversized, and-which are compressed as hereinafter set forth.

The inner'shell B is built up of a plurality I of similar rings 4, each of which has a rib 5 extending around its outer. eriphery of ashape similar to the rib 2. vhen two plates are pressed together a dovetailed seat is formed on the outside of the inner shell, and. felt rings 6 are placed in these seats. If a plurality of rings greater than 2 is employed it is obvious that all except the inner an outer will have ribs'on both-the inner and outer surfaces. 1

Metal rings 1 are provided with a plurality of bolt openings 7 therethrough, through which are adapted to pass bolts 8, which may be provided at both ends with nuts whereby the rings are drawn together, and the felt rings 3 are placed under the desired .pressure. The rings 4- of the inner shell are provided with similar openings 9 through which pass bolts 10.

A. bottom plate 11 is provided, having cut outs around its edge, in which lit a part of the nuts 13 of the bolts 8," and also having depressions 14 to receivethe nuts 15 on the lower ends of the bolts 10; This bottom plate may be held in anydesired manner, and may be rigid, semi-rigid, or floating. When the inner and outer shells are positioned upon the base plate 11, there will be an annular space 16 forming a pressing'chamber between the same which will receive the material to be pressed. There will also be a central cylindrical space within the inner shell. Both the upper and lower surfaces of the rings 1 are provided'with radial drainage grooves or outlets 18 which are about one thirty-second of an inch deep. Both surfaces of the rings 4 are provided with similar drainage grooves 19.

.The curb constructed asfabove and held in any desired manner has the annular press-.

'' at its working surface than elsewhere, and,

due to. the progressively receding walls of the dovetail seat, the packing is rendered less dense, progressively, from its working surface. Though liquid may pass through the more highly compressed working surface of the packing,the pores of said packin are sufiiciently closed to prevent their being clogged by small particles of. solid ma-" terial, and the flow of the liquids through the remainder of the packing is facilitated by means of the progressively more open con;

dition' of the packin It is immaterial for the purpose of this invention how the plunger is operated, and therefore it has not been illustrated.

It is obvious that other material may be used instead of the felt described, since it is only necessar that the rings permit the passage of liqui and. obstruct the passage of the material itself. While bolts have been shown for the purpose of placing the various rings forming the two shells under desired ressure, it is obvious that other means of ho ding the parts together may be employed. If the plunger is operated by hydraulic pressure, it may be desirable to have the rings themselves held together by bydraulic pressure, in which case'the pressure which holdstogether the rings may increase simultaneously with the increase --of pressure upon the plunger. It is then apparent that l have provided a curb for use in extracting liquids from solid materials comprising a plurality of concentric shells A and B having opposed faces, said faces being spaced to form a pressing chamber, the shells including a plurality of superposed rings land 4 respectively and rovided with drainage outlets 18. and .19, a jacent rings being conjointly formed on their opposed faces with annular seats communicating with drainage outlets, and an annular filtering packing located in each of said seats and having one face thereof completely exposed {)0 material being Worked within said cham- Other minor changes may be made without in any way departing from the spirit of the invention. It is obvious that the above arrangement provides a construction which said conforms with the two main principles necessary for a successful curb to be employed in connection with presses for extracting liquids from solids. It. provides a construction in which the 'use of press cloth or similar material is avoided, since the felt rings or thelr equivalents will require replacement only at long intervals. There is no possibility of clogging the drainage openings, and there chamber, each shell including a plurality of superposed rings provided with drainage outlets, adjacent rings being conjointly formed on their opposed faces with annular seats communicating with said drainage outlets, and an annular filtering packing located in each of said seats and having one face thereof completely expose-d to material being worked within said chamber.

2. A curb for use in extracting liquids from solid materials comprising a plurality of concentric shells having opposed faces, said faces being spaced to form a pressing chamber, each shell including a plurality of superposed rings provided with drainage outlets, adjacent rings being conjointly formed on their opposed faces with annular seats communicating with said drainage outlets, and an annular filtering packing located in each of said seats and having one face thereof completely exposed to material being worked within said chamber, the combined working surface of said packing being greater than the combined working surface of the opposed faces of said rings.

3. A curb for use in extracting liquids from solid materials comprising a plurality of concentric shells having opposed faces, said faces being spaced to form a pressing chamber, each shell including a plurality of superposed rings provided with drainage outlets, adjacent rings being conjointly formed on their opposed faces with annular seats communicating with said drainage outlets, an annular filtering packing located in each of said seats and havlng one face thereof completely exposed to material being Worked within said chamber, and means associated with each shell for drawing said rings together to clamp said packing in the seat-s.

4. A" curb for use in extracting liquids from solid materials comprising a plurality of concentric shells having opposed faces,

said faces being spaced to form a pressing chamber, each shell including a plurality of superposed rings provided with drainage outlets, adjacent rings being conjointly formed on their opposed faces with annular seats of substantially dovetailed form communicating with said drainage outlets, an annular filtering packing located in each 'of said seats and having one face thereof com pletely exposed to material being worked within said chamber, and means associated with each shell for drawing said rings together to clamp said packing in the seats, whereby the packing is more highly com pressed at its exposed surface than at other parts thereof.

5. A curb for use in extracting liquids from solid materials comprising a plurality of concentric shells having opposed faces,

said faces being spaced to form a pressing chamber, one of the shells including a plurality of superposed rings provided with drainage outlets, adjacent rings being conjointly formed on their opposed faces with annular seats communicating with said drainage outlets, and an annular filtering packing located in each of said seats and having one face thereof completely exposed to material being worked within said chamber.

6. A curb for use in extracting liquids from solid materials comprising a plurality of concentric shells having opposed faces, said faces being spaced to form a pressin chamber, one of the shells including a p urality of superposed rings provided with drainage outlets, adjacent rings being conjointly formed on their opposed faces with annular seats of substantially dovetailed form communicating with said drainage outlets, and annular filtering packing located in each of said seats and having one face thereof completely exposed to material being worked within said chamber, and means associated with each shell for drawing said rings together to clamp said packing in the seats, whereby the packing is more highly compressed at its exposed surface than at other parts thereof.

In testimony whereof, we have hereunto subscribed our names.

' WALTER ERNST.

HOWARD F. MAoMILLIN. 

